Persons With Diseases of the
Thymus Should Consider Alternatives to Receiving Yellow
Fever Vaccine CDC investigators have
identified diseases of the thymus as a possible risk
factor for severe complications following yellow fever
vaccine. [click for more info].
Barwick R. History of thymoma and yellow fever
vaccination. Lancet 2004; 364(9438):936.

Evidence of rare, severe
adverse reactions to 17D Yellow Fever Vaccine
Three articles and a commentary in the July
14, 2001 issue of the Lancet provide data on 7 people
who developed severe yellow-fever like illness following
yellow fever vaccines. Yellow fever vaccine is a live
attenuated viral vaccine. Investigators have speculated
that persons over 55 or 60 years of age may be at
increased risk of this rare complication.